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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-03-10 14:53:29 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-05-27 12:58:38 -0700 |
| commit | a738eec6c6082f48cbcf0157fd9f550e286ea04b (patch) | |
| tree | f0f8d12b0ab020b7b9e182bca5c7fedd65f3c2c6 /kernel/rcu/tree.c | |
| parent | cce7f1fc015a98ca9263bd5730c00258bc214e53 (diff) | |
| download | lwn-a738eec6c6082f48cbcf0157fd9f550e286ea04b.tar.gz lwn-a738eec6c6082f48cbcf0157fd9f550e286ea04b.zip | |
rcu: Correctly initialize ->rcu_qs_ctr_snap at online time
The rcu_data structure's ->rcu_qs_ctr_snap field is initialized at
CPU-online time from the current CPU's element of the per-CPU rcu_qs_ctr
variable. Unfortunately, this is at CPU_UP_PREPARE time, so has nothing
to do with the CPU being onlined. This commit therefore initializes
this variable from the incoming CPU's element of rcu_qs_ctr.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index a1df68fce545..d198a33d54bd 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3763,7 +3763,7 @@ rcu_init_percpu_data(int cpu, struct rcu_state *rsp) rdp->gpnum = rnp->completed; /* Make CPU later note any new GP. */ rdp->completed = rnp->completed; rdp->passed_quiesce = false; - rdp->rcu_qs_ctr_snap = __this_cpu_read(rcu_qs_ctr); + rdp->rcu_qs_ctr_snap = per_cpu(rcu_qs_ctr, cpu); rdp->qs_pending = false; trace_rcu_grace_period(rsp->name, rdp->gpnum, TPS("cpuonl")); raw_spin_unlock_irqrestore(&rnp->lock, flags); |